materials testing | Equipment
the influence of relative humidity on its mechanical and thermal properties can be determined. These and other systems can be easily mounted, changed and dismounted within seconds, Anton Paar says. With special features such as the Toolmaster for automatic recognition of the measuring system or chamber, and the company’s QuickConnect coupling for measuring system connection, accessories can be changed quickly and easily.
Below: Gabo Eplexor is the latest modular dynamic- mechanical analyser from Netzsch
Thermal effects Alexander Schindler and colleagues from Netzsch, writing in the Journal of Thermal Analysis and Calorim- etry (Schindler A, Strasser C, Schmölzer S et al. J Therm Anal Calorim (2016) 123: 2405. doi:10.1007/ s10973-015-5026-x), point out that the consideration of measurement signals originating from methods such as differential scanning calorimetry (DSC), thermo- gravimetry (TG), dilatometry (DIL) or thermomechanical analysis (TMA) has normally required intensive examination by experienced users. Effects such as glass transitions or other calorific effects that may occur in a measurement curve first need to be identified visually before they can be evaluated, they point out. Nowadays, the evaluation of effects, once identified, is supported by software routines that work according to known standards. Moreover, thermoanalytical measurement curves
usually require careful interpretation that demands both experience and time. Measurement curves typically need to be compared with literature or textbook data, which do not exist for every material or for every measurement condition applied. For a long time, the possibility of a computer-based identification of a measurement by means of a comparison with a database did not exist for thermoanalytical curves. That was until 2014, claims Netzsch, when the company introduced the first comput- er-based curve recognition and database system for DSC curves.
The Identify system
involves autonomous and automatic evaluation of measurement curves by means of a software function called Auto- Evaluation. Iden- tify and AutoEvalua- tion, which are both part of the Netzsch Proteus evaluation software, significantly simplify the evaluation
48 COMPOUNDING WORLD | September 2016
Anton Paar’s Modular Compact Rheometer (MCR) 702 equipped with Convection Temperature Device 180 (CTD) and humidity option
and interpretation of thermoanalytical measurement curves. Netzsch recently expanded Identi- fy, implementing not only DSC curves but also data from TG, DIL, TMA and specific heat capacity, cp
, of a wide
range of polymers and other materials within the same database system. Identify can recognise measurement curves or - when the search temperature range is restricted - just selected parts of a measurement curve via comparison with database measurements (although Netzsch points out that recognition of a thermoanalytical measurement curve is not automatically an identification of a mate- rial). “Both AutoEvaluation and Identify considerably simplify the evaluation and interpretation of thermo- analytical measurement curves,” says Schindler. Proteus will be under the spotlight on the Netzsch
stand at K2016. Its capabilities will be demonstrated for the company’s DSC 214 Polyma and DSC 204 F1 Phoenix equipment, as well as for two thermobalances, the TG 209 F1 Libra and TG 209 F3 Tarsus. Also on the stand will be the new Netzsch Gabo Eplexor, described as an easy-to-use, modular testing instrument for the thermo-mechanical characterisation of various materials. This uses an electrodynamic oscillator to generate defined deformations across a wide frequency and temperature range. This allows for predictions about a material’s behavior without any need to test it in the field.
Rheometer advances Dynisco is expanding its online rheometry offering with two important updates to its CMR IV Online Polymer Rheometer. The CMR IV provides polymer producers and compounders with the ability to continuously measure the rheological properties of their process. The information gathered provides the processor with the ability to trace lot to lot history of the production
www.compoundingworld.com
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